In this paper, using least squares fitting method curve fitting of the radar target track, radar track matching result is calculated according to the Euclidean distance between the radar target track and the real track. This algorithm overcomes the error correlation matching results existing in the situation of missing information and target maneuver and so on, and improves the matching accuracy of radar target track and real track. The radar track matching accuracy is verified by the multiple platform simulation system. The algorithm has got good application in practical engineering simulation system.